captioning sponsored by rose communications from our studios in new york city, this is charlie rose. >> rose: we want to talk about facebook, social media and the digital revolution. ken auletta is here, he writes for the "new yorker" magazine. his column "the annals of communication" extensively covers the tech giants of silicon valley. in july he wrote a profile of sheryl sandberg called "a woman's place: can sheryl sandberg upend silicon valley's male-dominated culture?" tonight we'll look at where facebook stands, the recovery from the highly disappointing i.p.o., the move towards mobile technology, the enduring concerns about privacy and the competition with google. i am pleased to have ken auletta back at this table to talk about that before we show you an interview i did with sheryl sandberg and marc andreessen who's on the board of facebook. we begin with this question, though. where is facebook today after all the controversy about that i.p.o. >> they're in a very strong position. they've got over a billion users in the world. that -- two months ago it was 900 million users